public function validateSignature($orig, $sig, $pk)
{
// Bob verifies and removes the signature
$msg_orig = \Sodium::crypto_sign_open($sig . $orig, $pk);
$check = $msg_orig !== false;
if (!$check) {
var_dump($orig);
var_dump(base64_encode($sig));
var_dump(base64_encode($pk));
}
return $check;
}
